J. Mason Farm

J. Mason Farm is a historic farm located near Ashland, New Castle County, Delaware. The property includes two contributing buildings. They are a stone house (1827) and a stone and frame bank barn (c. 1827). The house is a two-story, gable-roofed, fieldstone structure with a two-story, three-bay, frame wing that may have been added in the 1930s or 1940s. The barn walls are of uncoursed fieldstone finished with a pebbled stucco.

In the 20th century, it became part of Ashland Farm, a Du Pont estate. It was added to the National Register of Historic Places in 1986.